Insulating means for pipes and the like.



H. KUMPF. INSULATING MEANS FOR PIPES AND THE LIKE. APPLIUATIOH mum JULY2a, 1905.

990,658, Patented Apr. 25, 1911.

, curved pipe.

UNITED STATES PATENT OFFICE.

HEINRICH KUMPF, 0F STUTTGART, GERMANY.

INSULATING MEANS FOR PIPES AND THE LIKE.

To all-whom it may concern:

Be it known that I, HEINRICH KUMrr, citizen of the German Empire,residing at Stuttgart, in the Kingdom of Wiirtemberg, Germany, haveinvented certain new and useful Improvements in and Connected withInsulating Means for Pipes and the Like; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to non-conducting covering employed forinsulating steam pipes and the like, and has for its principal object toprovide an insulating covering that is flashed with fire-proofing andwhich will fully protect the pipe from exposure to low temperature withthe resultant condensation of steam.

A further object of the invention is to provide a non-conducting andincombustible covering that is formed of felt saturated with afire-proof composition, such for instance as chlorid of magnesium orchlorid of aluminum and ma-gnesite, which, when dried, will hold thesheet-s or strips of felt in any shape to which they have been molded.

Vith these and other objects in view, my invention consists in theconstruction and combination of elements hereinafter de scribed andparticularly pointed out in the claim.

Figure 1 is a perspective view of a pipe covering designed for theprotection of a straight pipe, and shown .as formed in two sections.Fig. 2 is a similar view showing a covering designed for use on anelbow, or Fig. 3 shows a set of pipes partly protected by the improvedcovering.

In carrying out the invention, sheets or strips of felt are cut intoproper shape and saturated in a binding material or substance thatpreferably is of such nature as to render the felt non-inflammable. Forinstance, a solution of chlorid of magnesium or chlorid of aluminum andmagnesite burned and ground. The magnesite, of course, when burnedbecomes magnesia. The magnesia or ground magnesite re-aots with themagnesium chlorid to produce magnesium oxychlorid, which serves tocement together particles of felt.

In preparing the covering, the magnesite Specification of LettersPatent.

Application filed July 26, 1905.

Serial No. 271,394.

is stirred into the chlorid of magnesium until a thin milky liquid isformed. The felt in the form of sheets is the-Ii laid into the liquid orsolution and the liquid will be taken up by the felt. After this, thefelt is then pressed in a suitable apparatus so that a greater part ofthe solution is removed from the felt thus leaving the fabricimpregnated with a small quantity of oxychlorid of magnesium. The sheetsof felt with the comparatively small quantity of the liquid therein, areplaced into suitable molds and pressed into shape and allowed to drywhile in the mold, so that the felt will retain the general shape of themold, but said molded covering will be pliable so that the same may beto a certain extent shaped to a part to which it is to be applied.

The molds are shaped to conform to the pipes or other articles to whichthe covering is to be applied, and while coverings may be made in theform of complete tubes, they are preferably sectional in order to permitready application to pipes already in place.

In the construction shown in-Fig. 1, the covering comprises twosections, a, a, each approximately semi-circular in cross section,

and designed to be applied to a straight pipe; whlle in Fig. 2, thesections, 22, b, are shaped for application to an elbow, or curved pipe.In the construction shown in Fig. 3,.the coverings a, b, are shown asapplied to a number of connected pipes c, d.

Having thus described the invention, what- Patented Apr. 25, 1911. i

a small quantity of oxychlorid of magnesium formed by a mixture ofchlorid of magnesium and ground magnesite or magnesia, the strips offelt being shaped or molded to the desired form and the felt fibersbeing molded or held pliably in the form to which they are molded by thebinding action of the oxvchlorid of magnesium.

v In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

HEINRICH KUMPF.

Witnesses:

A. L. DRAUTZ, Rnnonr BREGHT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G."

